On Thu, Sep 03, 2015 at 08:21:25AM -0700, tmcclure0501 wrote: > We have an embedded MQTT framework that we want to configure for mutual > authentication. The framework is complaining that it needs a key format of > PKCS#1. We have p12 and pem formats of the key. Does openssl support > converting keys to the PKCS#1, if so what is the command? I've never heard of a PKCS#1 key format, I'm only aware of PKCS#8 - Private key PKCS#12 - Private key and related certificates Consult the documentation for the product, this is not an OpenSSL question until at least the desired key format is known. -- Viktor.